简介：Thestrongestsignalofplantpromoterissearchedwiththemodelofsinglemotifwithtwotypes.ItturnsoutthatthedominanttypeistheTATA-box.TheothertypemaybecalledTATA-lesssignal,andmaybeusedingenefindersforpromoterrecognition.WhiletheTATAsignalsareverycloseforthemonocotandthedicot,theirTATA-lesssignalsaresignificantlydifferent.Ageneralandflexiblemulti-motifmodelisalsoproposedforpromoteranalysisbasedondynamicprogramming.ByextendingtheGibbssamplertothedynamicprogrammingandintroducingtemperature,anefficientalgorithmisdevelopedforsearchingsignalsinplantpromoters.

简介：Tocollectneuronalactivitydatafromawake,freelybehavinganimals,wedevelopedminiaturetelemetryrecordingsystem.Theintegratedsystemconsistsoffourmajorcomponents:1)Microelectrodesandmicro-driverassembly,2)analogfrontend(AFE),3)programmablesystemonchip(PSoC),and4)radiotransceiverandtheLabVIEWwereusedasaplatformforthegraphicuserinterface.Theresultshowedthesystemwasabletorecordandanalyzeneuronalrecordingsinfreelymovinganimalsandlastedcontinuouslyforatimeperiodofaweekormore.Thisisveryusefulforthestudyoftheinterdisciplinaryresearchofneuroscienceandinformationengineeringtechniques.Thecircuitsandarchitectureofthedevicescanbeadaptedforneurobiologyandresearchwithothersmallanimals.

简介：AnewmethodofphasespectralanalysisofEEGisproposedforthecomparativeanalysisofphasespectrabetweennormalEEGandepilepticEEGsignalsbasedonthewaveletdecompositiontechnique.Byusingmultiscalewaveletdecomposition,theoriginalEEGsaremappedtoanorthogonalwaveletspace,suchthatthevariationsofphasecanbeobservedatmultiscale.Itisfoundthatthephase(andphasedifference)spectraofnormalEEGsaredistinctfromthatofepilepticEEGs.Thatisthevariationsofphase(andphasedifference)ofnormalEEGshaveadistinctperiodicpatternwiththeelectricalactivityproceedsinthebrain,butdonottheepilepticEEGs.ForepilepticEEGs,onlyatthosetransientpoints,thephasevariationsareobvious.Inordertoverifytheseresultswiththeobservationaldata,thephasevariationsofEEGsinprincipalcomponentspaceareobservedandfoundthat,thefeaturesofphasespectraisincorrespondencewiththatthewaveletspace.TheseresultsmakeitpossibletoviewthebehaviorofEEGrhythmsasadynamicspectrum.

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简介：BasedonthetheoryofDuffingoscillatorweaksignaldetectionandthetechnologyofextendedbinaryphaseshiftkeying(EBPSK)modulation,thechaoticdemodulatorusingtheDuffingoscillatorforEBPSKsignalswasproposed.Theproposeddemodulatorcouldavoidtheproblemofdemodulationfiltersdesign,andshowstheexcellentanti-noisecapabilityofchaoticoscillatordetection.Numericalandexperimentaltestsweretakentoinvestigatetheimpactofmodulationparametersτandθonbiterrorperformanceoftheproposedmethod,andtheperformancelimitsweregotten.Theresultsshowthattheproposedchaoticdemodulatorworkswellunderaverylowsignal-to-noiseratio(SNR)conditions,andgetsSNRgainsabout20dBto30dBfromtheimpulsefilter.

简介：T房间受体(TCR)的结扎独自是不够的导致T淋巴细胞的完整的激活。介绍房间(APC)和T房间的抗原上的另外的ligand受体相互作用(costimulation)被要求。T房间costimulation被显示了为得到有效T房间回答必要，包含在T房间开发期间的所有阶段。然而，costimulation由影响T房间的功能的机制仍然需要被阐明。在最近的年里，在癌症，传染疾病以及自体免疫的疾病作为潜在的治疗在costimulation的研究被献殷勤。在这评论，我们讨论了调整T房间增长，房间周期前进，cytokine生产，幸存，和存储器开发的细胞内部的costimulation信号。一般来说，phosphoinositide-3kinase(PI3K)的小径/proteinkinaseB(PKB，也作为Akt知道)/nuclear因素B(NF-B)可能对许多costimulatory效果中央。通过这些小径，costimulation由survivin和曙光B表示的维护控制T房间扩大和增长，并且由调整bcl-2家庭成员的表达式支撑长期的T房间幸存和存储器开发。

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简介：Acousticimpulsesproducedthroughthemechanismofthelaser-inducedbreakdowninwaterhavebeeninvestigatedintherangefrom0℃toroomtemperature.Differentlyfromtheacousticimpulsesproducedviathermalexpansion,thepolarityandtheamplitudeofacousticimpulseproducedvialiquidbreakdownmechanismdonotchangewithwatertemper-ature.Thisindirectlyprovesthattheproductionofacousticimpulseisduetotheexpansionofthecavityitselfwhichincludesplasma.Asemiempiricaldescriptionofthisphenomenonisgiveninthispaper.

简介：Withtherapiddevelopmentofbraincomputerinterface(simplycalledBCI),electroencephalography(EEG)willbeanotherinterestingbio-electricalsignalappliedinroboticsafterEMG.Inordertorealizeitfinally,theaccuratemeasurementandpatternrecognitionofEEGsignalmustbeaveryimportantandelementaryresearchobjective.Basedonourcurrentresearchesandsomereportsfromtheotherinternationalcolleaguesinthefield,wedeeplydiscussthebasiccharacteristicsofEEGsignal,thedevelopmentandselectionofEEGmeasurementsystem,featureextractionandrecognitionmethodsofEEGsignal,andthenreviewEEG'sapplicationsinroboticsaswellasthefutureresearchtrendsinthispaper.

简介：关联向量机器(RVM)的普通信号分类的一条新途径基于向量机器(SVM)和RVM被比较并且分析的支持的核方法被介绍，二发信号分类器。信号的开始的几个柔韧的特征作为分类器的输入被提取，然后，内核思维被用来隐含地印射特征向量到高维的特征空格，和多班RVM和SVM分类器被设计完成AM，CW，SSB，MFSK和MPSK信号识别。模拟结果看了那什么时候选了有的合适的参数，RVM和SVM为可比较的精确性，但是RVM有更少的学习时间和基础功能。RVM的分类速度比SVM快得多。

简介：Thedriftingbaselinesofcapillaryelectrophoresisaffecttheveracityofanalysisgreatly.ThispaperpresentsThresholdFittingTechnique(TFT)soastosubtractthebaselinesfromtheoriginalsignalsandemendatethesignals.InTFT,waveletandcurvefittingtechniqueareappliedsynthetically,thresholdsaredecidedbythecomputerautomatically.ManyexperimentsofsignalprocessingindicatethatTFTissimpleforbeingused,therearefewman-inducedfactors,andtheresultsaresatisfactory.TFTcanbeappliedfornoisysignalswithoutanypre-processing.

简介：Anewmethodofestimatingthefrequency-knownsignalsfromthestrongbackgroundnoisewaspresentedfirst.Thenthenewmethodwasusedinthedemodulationofthedigitalfrequencymodulation(FSK)signals.ThenewdemodulationmethodcancompletethedemodulationoftheFSKsignalsonlywiththecarrierfrequencyandwithoutanycarrierphaseinformation.Thesimulationresultsshowthattheperformanceofanti-noiseofthenewmethodisbetterthanthatoftheincoherentdemodulationmethodandthefluctuationofthecarrierphasehaslittleeffectonthenewmethod.Sothenewdemodulationmethodhasafineprospectinthepracticalapplications.

简介：Basedonthewhiteningpropertyofwavelettransformationfor1/fnoise,thispaperaddressestheproblemofdetectingdeterministicsignalsinthepresenceof1/ffractalnoise.Thetransferfunctionofwhiteningfilterisprovidedaswellastheconditionforwhitening.ThereceiverstructurebasedonKarhunen-Loeveexpansionandthedecisionrulearealsogiven.Finallyperformanceofthedetectorisanalyzed.

简介：频率当横梁前者收到宽带信号时，不变的反应算法为在高频率克服信号失真被建议。在这个方法，参考书横梁模式的重量向量第一被设计，然后重量向量在主要接近参考书反应的频率亚乐队的横梁反应什么时候被计算由，优化了方法或适应方法。由这个方法，在每sub-bandcan的横梁模式几乎被使不变。作为结果，收到啁啾信号能被改进。由于到途径的适应方法的采纳优化向量，它没有限制数组格式和元素择向性，和方法能广泛地被使用。

简介：英语中有一类示意词(Signals),虽属普通词汇,数量也不多,但在英语中出现频率很高,作用很大,意思比较微妙。如果不能正确地使用这类示意词,则英语听起来就很不地

简介：这研究的目的是根据EEG信号的复杂性措施的值识别大脑的函数和状态。30件正常样品和30件耐心的样品的EEG信号是镇定的。为未加工的数据基于预处理，为复杂性措施的一个计算程序被编译，所有样品的复杂性措施是计算的。吝啬的值和控制组的复杂性措施的标准错误作为0.33和0.10，并且正常的组作为0.53和0.08。当信心度是0.05时，为控制组的复杂性措施的正常人口平均数的信心间隔是(0.2871,0.3652)，并且(0.4944,0.5552)为正常的组。正常样品和耐心的样品能清楚地是的统计结果表演由措施的价值区分了。在临床的药，结果能是是引用评估函数或状态，诊断疾病，监视大脑的康复进步。

简介：Manymonographspointoutthatdifferentialencodinganddecodingisnecessaryforef-fectualinformationtransmissionagainstphaseambiguitywhileseldomdiscussthereasonwhyphaseambiguitywillemergeinevitably.Availablealgorithmsarespeciallydesignedforcertainmodulationscheme;thesealgorithmscannotsatisfytherequirementofsoft-definedradio,whichperhapsdemandsauniformalgorithmfordifferentmodulations.Thispaperproposesanewopiniononphaseambiguityfromtheviewofprobability.Thisopinionbelievesthatmodulatingsymbolsequencecanaffect,atoptimumsamplingepoch,themodulatedwaveformasoscillatingcarrierhasdone,andsothestochasticsequenceleadstophaseambiguity.Basedonageneralsignalmodel,thispaperalsoputsforwardanoveluniversalalgorithm,whichissuitablefordifferentsignals,evensomenewones,byconfiguringseveralparameters.

简介：广州春天降雨主要展出内部年变化30年的ofQuasi每年两次、内部的十的变化，并且在时间放大的弱降雨atinterdecadal的时期。Nino3的SST异例(SSTA)是Guangzhouspring降雨的最强壮的先锋。他们从以前的11月有重要积极关联并且稳定地坚持到4月。在以前的冬季的Nino3SSTA在春天通过NorthPacific副热带的高、低的风影响广州春天降雨。当Nino3SSTA在以前的冬季是积极的时，跳副热带的高度是强烈的，向西，华南位于在搬运到华南的副热带的高度，和水汽的边登上气流的区域被反气旋循环加强到菲律宾的东方。广州春天降雨因此是重的。当Nino3SSTA是否定的时，副热带的高度弱、东方，华南从副热带的高度是遥远的并且位于下气流的区域，并且因为低级气旋的循环控制区域到菲律宾的东方，北方风在华南占优势，搬运到华南的水汽是弱的。广州春天降雨因此是弱的，春天干旱被结果。